Title :
Low-power low-voltage differential class-AB OTAs for SC circuits
Author :
Carvajal, R.G. ; Galan, J. ; Ramirez-Angulo, Jaime ; Torralba, A.
Author_Institution :
Departamento de Ingenieria Electronica Escuela Superior de Ingenieros, Seville Univ., Spain
fDate :
10/24/2002 12:00:00 AM
Abstract :
Two new differential class-AB operational transconductance amplifiers (OTAs) for SC circuits that operate with a supply voltage of less than two transistor threshold voltages are introduced. They make use of a new class-AB pseudodifferential pair to generate signal currents much larger than quiescent currents. Both OTAs have been designed to operate with a supply voltage of VDD=1.1 V, using a 0.35 μm CMOS technology. Simulation results for a load capacitance (CL) of 1 pF show 15 MHz gain-bandwidth product with a quiescent power consumption of 10 μW.
Keywords :
CMOS analogue integrated circuits; differential amplifiers; low-power electronics; operational amplifiers; switched capacitor networks; 1 pF; 1.1 V; CMOS technology; biasing current; common-mode operation; differential class-AB OTA; fast complete charge transfer; fast settling response; load capacitance; low-power low-voltage OTA; pseudodifferential pair; simulation; switched capacitor circuits;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20020958
